FIRSTRANKER. 1. (a) What are the advantages of the adjustable voltage regulators over the fixed

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1 Code No: 07A51102 R07 Set No (a) What are the advantages of the adjustable voltage regulators over the fixed voltage regulators. (b) Differentiate betweenan integrator and a differentiator. [8+8] 2. List and explain any two applications of PLL in detail. [16] 3. (a) What is the need for a parity ch e cke r? (b) Design an oddparity generator, for an 8 bit binary wo r d s. [8+8] 4. (a) Design a first -order low pass filter so that it has a cut off frequency of 2kHz and pass Band gain of 1 (b) Convert the 2kHz low pass filter to a cut off frequency of 3kHz in part (a) [8+8] 5. Explain the features of the TTL logic family. [16] 6. Explain with neat block diagram a ty p i c a l application in which A/D and D/A conversions are employed? [16] 7. What is the vo l t a g e at pointa and B for the circuit as shown in figure 1 if V 1 = 5V and V 2 = 5.1V. [16] Figure 1: 8. (a) Explain how programming a RAM is different from programming a ROM? (b) Explain about DRAMs. [8+8] 1

2 Code No: 07A51102 R07 Set No (a) How many bits are required to design a DAC, that has a resolution of 5mv? The ladder has +8V full scale. (b) How many resistors are required for an 8-bit weighted resistor DAC? What are the resistance v a l u e s, assuming the smallest resistance is R? [16] 2. (a) Design a First order HPF at a cut off frequency of 3kHz. (b) Draw the frequency response of the above filter. [8+8] 3. (a) Explain Astable multivibrator as a square wave oscillator. (b) With a circuit explain 555 timer as a free running mu l t i v i b r a t o r. [8+8] 4. (a) Explain why open loop configurations are not used in linear applications? (b) F o r an op-amp, PSRR=70dB(min), CMRR=10 5, differential mode gain A d =10 5, The output vo l t a g e ch a n g e s by 20v in 4 µ seconds. Calculate i. Numerical v a l u e of PSRR ii. CMRR iii. Slew rate. [16] 5. Implement the following functions using a multiplexer. (a) F (A,B,C) = m(1,3,5,6) (b) F (A,B,C) = m(0,1,3,4,8,9,15) [16] 6. Explain Static and dynamic RAM s, their characteristics, advantages, disadvantages, and applications. [16] 7. (a) Draw the wave forms of the comparator for V ref > 0and V ref < 0. (b) F o r the ( strain gauge bridge circuit as shown in figure 2, given that V ab = V R ) dc R. Assume that under the strained conditions the resistances RT1 and R T3 decreases and that of R T 2 and R T 4 increases by the same amount RΩAlsoR T1 = R T2 = R T3 = R T4 = R, under unstrained conditions. [4+12] 8. Explain the MOS and CMOS logic families and give different CMOS characteristics. [16] 2

3 Code No: 07A51102 R07 Set No. 4 Figure 2 * * * * * 3

4 Code No: 07A51102 R07 Set No. 1 Figure 2: 1. (a) Explain the importance of 555 timer in designing a monostable multivibrator (b) Design a monostable mu l t i v i b r a t o r using 555 timer to produce a pulse width of 100msec. [16] 2. (a) Design a second order high pass filter at a cut off frequency of 1kHz. (b) Draw the frequency response of the network in part (a). [16] 3. (a) Write short notes on the following: (i) Level triggering. (ii) Edge triggering. (iii) Pulse triggering. (b) Explain the functioning of RS flip-flop using NAND gates. [8+8] 4. (a) Explain the operation of a monostable multivibrator. (b) F o r the integrator circuit as shown in figure 3 the input is a sine wave with a peak-to-peakamplitude of 5V at 1kHz. Draw the output voltage wave f o r m if R 1 C F = 0.1ms and R F =10R 1. Assume that the voltage across C F if initially zero. [6+10] Figure 3 4

5 Code No: 07A51102 R07 Set No. 1 Figure 3: 5. (a) What are the sources of analog errors in an ADC? (b) What is meant by differential linearity an ADC? [8+8] 6. With the help of a neat circuit diagram explain how extremely low propagation in ECL logic can beachieved. [16] 7. Show that the input impedance for the non-inverting amplifier circuit as shown in figure 4 is R if = R i (1 + z 1 z 1 +z f )A V where R i the input impedance of OPAMP and R 0 =0 and Av is the gain without feedback. [16] Figure 4: 8. (a) Explain parity generator and parity checker? (b) Design a digital comparator for 2-bit numb ers? [8+8] 5

6 Code No: 07A51102 R07 Set No (a) With neat circuit diagram explain a master-slave Flip-flop and also draw the timing diagram (b) Explain about asynchronous Flip Flops. [8+8] 2. (a) Explain the concept of current mirror circuit by drawing the circuit. (b) What is an integrated circuit chip? What it consist of? [8+8] 3. (a) Explain the current limiting feature of 723 regulator? (b) Design a differentiator that will differentiate an input signal with f max =100Hz. [8+8] 4. F o r a second order butter wo r t h filter given C 2 = C 3 = 0.047µF; R 2 = R 3 = 3.3kΩ, R 1 = 27kΩ, and R F = 15.8kΩ (a) Determine the lower cutoff frequency f L of the filter. (b) Draw the frequency response plot of the above filter. [8+8] 5. With the help of logic circuits explain a Multiplexer and a Demultiplexer also give their circuit symbols and give their applications? [16] 6. Explain the basic principles used in PLL. What does the feed back system consist. Explain. [16] 7. (a) What are the advantages of R-2R adder type D/A converter over weighted resister typ e? (b) In an inverted R-2R ladder, R=R f =22kohms and V R =12V. Calculate the total current delivered to the op-amp and the output voltage when the binary input [8+8] 8. Compare the v a r i o u s Logic F a m i l i e s. [16] 6

INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad

1 P a g e INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad - 500 043 ELECTRONICS AND COMMUNICATION ENGINEERING TUTORIAL QUESTION BANK Name : INTEGRATED CIRCUITS APPLICATIONS Code